Group tiny parts into an other segment
For dense part-to-whole stacked column charts, use category grouping for tiny segments to improve readability and mitigate label clutter for readers scanning the important parts.
- purpose:refine
- basis:heuristic
- chart:bar
- operator:part-whole
- density:dense
- quality:readability
- lever:encoding
- polish:declutter
advice
Merge tiny segments
Combine tiny segments into a larger grouped segment when they are not important individually. For example, merge multiple slivers into an “other” category so the chart needs fewer labels and the important parts stand out.
reason
Why grouping small parts cleans up the chart
Many tiny stacked segments create visual noise and too many labels. Grouping them gives the reader a cleaner path to the parts that matter most.
Mechanism: Fewer tiny segments and fewer labels reduce clutter and direct attention toward the important parts of the composition.
Evidence: The post recommends grouping tiny parts together into one bigger part such as “others” to clean up the chart, lead the reader’s eye to the important parts, and reduce the number of labels (Muth, 2018).
context
Use when tiny segments crowd the stack
- User Goal: Keep attention on the important parts of each total.
- Task: Reduce clutter in a stacked column chart.
- Data: Many small parts, including several tiny categories.
- Chart Setting: The chart needs labels for multiple segments.
- Audience: Readers should be able to navigate the chart quickly.
- Success Criterion: Important parts stand out and the label burden drops.
exceptions
Do not use when a tiny part is important on its own
Break it when: A tiny segment is itself important to the message. Why: Grouping it into “other” hides the part the reader needs to notice.
costs
What you give up
Sacrifice: You give up detail on the grouped tiny categories. Risk: Readers cannot inspect those small categories separately after grouping. Mitigation: Group only the tiny parts that are not important individually.
mistakes
Common failure mode
Mistake: Leaving every tiny segment separate even when most of them are not important. Why it fails: The stack fills with slivers and labels that compete with the main message.
check
Test the grouping
Failure Sign: The chart has many slivers and too many labels to scan comfortably. Quick Check: If several tiny segments need labels but are not important individually, group them. Stronger Test: Compare the chart before and after grouping; if the important parts become easier to follow and label count drops, keep the grouped version.
fix
Revise the design
- Merge the tiny segments into one grouped segment such as “other.”
- Remove the now-unnecessary small labels from the separate slivers.
- Keep the individually important parts separate from the grouped segment.